Timepiece

Abstract

To provide a timepiece having a bezel which is easy to set in position, and which is not inadvertently rotatable after it has been set in position. A bezel is rotatably mounted on the bezel mounting portion of a case band. A click member is held vertically movably in the stepped hole of the case band and is urged toward the engaging portion of the bezel composed of a plurality of serrations. An operating member which has a depression having an oblique push-up surface and a closing surface contiguous to its push-up surface is held movably in a accommodating portion formed in the case band and crossing the lower end of the stepped hole at right angles thereto. The operating member is urged to its position in which its closing surface closes the lower end of the stepped hole. A stopper member capable of entering and leaving the depression along its push-up surface is positioned between the click member and the operating member. The member is movable to restrict the movement of the click member by the stopper member supported on its closing surface, while releasing the click member from such restriction and permitting its vertical movement by allowing the member to drop into the depression.

1. A timepiece comprising:
 a case band having a bezel mounting portion formed by an annular recess which is open at its top and along its outer periphery, a stepped hole formed by a large diameter hole portion open in the bottom surface of the mounting portion and a small diameter hole portion connected with the lower end of that hole portion, and a accommodating portion connected with the lower end of the small diameter hole portion and crossing the stepped hole at right angles thereto; 
 an annular bezel mounted in the bezel mounting portion rotatably both clockwise and counterclockwise relative to the case band and having an engaging portion formed in its rear surface facing the bottom surface of the bezel mounting portion by a plurality of serrations lying in the direction of its rotation; 
 a click member held in the stepped hole vertically movably for engaging the engaging portion or disengaging therefrom; 
 an urging body held in the large diameter hole portion for urging the click member toward the engaging portion normally; 
 an operating member having a depression having an oblique push-up surface and a closing surface contiguous from the push-up surface at the open end of the depression and held in the accommodating portion movably to have its depression positioned in its unlocking position contiguous to the lower end of the small diameter hole portion by operation from outside the case band; 
 an urging member urging the operating member normally for positioning the operating member in its locking position in which its closing surface closes the lower end of the small diameter hole portion; and 
 a stopper member positioned between the click and operating members movably into and out of the depression along the push-up surface by movement of the operating member so that when it has left the depression and is supported on the closing surface, it may restrict the movement of the click member away from the engaging portion, while it relieves the click member from its restriction and allows its vertical movement when it has dropped into the depression. 
 
   
   
     2. A timepiece as set forth in  claim 1 , wherein the click member is formed by a shank having a lower end engageable with the stopper member from above and a semi-spherical head formed at the upper end of the shank as an integral part thereof engageably with the engaging portion, while supporting the urging body. 
   
   
     3. A timepiece as set forth in  claim 1 , wherein the click member is formed by a shank having a lower end engageable with the stopper member from above and a head rest at its upper end, and a head formed by a ball positioned on the head rest rotatably and engageably with the engaging portion. 
   
   
     4. A timepiece as set forth in  claim 1 , wherein the accommodating portion is formed by a hole extending radially of the case band, the operating member is formed by an inserted shaft fitted slidably in the accommodating portion and a push button formed as an integral part of the shaft and protruding outward from the case band and the depression is defined by a single continuous groove formed along the circumference of the inserted shaft, while the closing surface is defined by the circumferential surface of the inserted shaft which is situated more inwardly of the case band than the depression is. 
   
   
     5. A timepiece as set forth in  claim 2 , wherein the accommodating portion is formed by a hole extending radially of the case band, the operating member is formed by an inserted shaft fitted slidably in the accommodating portion and a push button formed as an integral part of the shaft and protruding outward from the case band and the depression is defined by a single continuous groove formed along the circumference of the inserted shaft, while the closing surface is defined by the circumferential surface of the inserted shaft which is situated more inwardly of the case band than the depression is. 
   
   
     6. A timepiece as set forth in  claim 3 , wherein the accommodating portion is formed by a hole extending radially of the case band, the operating member is formed by an inserted shaft fitted slidably in the accommodating portion and a push button formed as an integral part of the shaft and protruding outward from the case band and the depression is defined by a single continuous groove formed along the circumference of the inserted shaft, while the closing surface is defined by the circumferential surface of the inserted shaft which is situated more inwardly of the case band than the depression is. 
   
   
     7. A timepiece as set forth in  claim 1 , wherein the stopper member is formed by a sphere. 
   
   
     8. A timepiece as set forth in  claim 2 , wherein the stopper member is formed by a sphere. 
   
   
     9. A timepiece as set forth in  claim 3 , wherein the stopper member is formed by a sphere. 
   
   
     10. A timepiece as set forth in  claim 4 , wherein the stopper member is formed by a sphere. 
   
   
     11. A timepiece as set forth in  claim 5 , wherein the stopper member is formed by a sphere. 
   
   
     12. A timepiece as set forth in  claim 6 , wherein the stopper member is formed by a sphere.